---
title: "CVE-2026-50275: Datadog PHP Tracer - Denial of Service"
description: "Datadog PHP Tracer < 1.19.2 contains a denial of service caused by unbounded parsing of W3C baggage HTTP headers in ddtrace_deserialize_baggage, letting remote unauthenticated clients exhaust CPU and memory, exploit requires sending large or oversized baggage headers."
url: https://panop.io/threat-heartbeat/CVE-2026-50275/
---

# CVE-2026-50275 Datadog PHP Tracer - Denial of Service

Datadog PHP Tracer < 1.19.2 contains a denial of service caused by unbounded parsing of W3C baggage HTTP headers in ddtrace\_deserialize\_baggage, letting remote unauthenticated clients exhaust CPU and memory, exploit requires sending large or oversized baggage headers.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.68% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-50275)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

17 September 2026

Updated

15 October 2026

Weakness

[CWE-770](https://cwe.mitre.org/data/definitions/770.html)

## Vendor fix

Upgrade to version 1.19.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-50275](https://nvd.nist.gov/vuln/detail/CVE-2026-50275)
- [https://github.com/DataDog/dd-trace-php/pull/3854](https://github.com/DataDog/dd-trace-php/pull/3854)
- [https://github.com/DataDog/dd-trace-php/releases/tag/1.19.2](https://github.com/DataDog/dd-trace-php/releases/tag/1.19.2)
- [https://github.com/DataDog/dd-trace-php/releases/tag/1.20.0](https://github.com/DataDog/dd-trace-php/releases/tag/1.20.0)
- [https://github.com/DataDog/dd-trace-php/security/advisories/GHSA-phwx-ww2p-cv9v](https://github.com/DataDog/dd-trace-php/security/advisories/GHSA-phwx-ww2p-cv9v)
- [https://github.com/DataDog/dd-trace-php/commit/2f7987eb02e306bb62bce8ec4152dece68112f51](https://github.com/DataDog/dd-trace-php/commit/2f7987eb02e306bb62bce8ec4152dece68112f51)
- [https://github.com/DataDog/dd-trace-php/commit/43072ccafe55a5dbdfba75a42bf316b4150ae1e5](https://github.com/DataDog/dd-trace-php/commit/43072ccafe55a5dbdfba75a42bf316b4150ae1e5)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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